Home / 30,938.25-42,705.87-18,363

Finding the Fourth Proportional to 30,938.25, 42,705.87 and 18,363

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Solution

The fourth proportional to 30,938.25, 42,705.87 and 18,363 is: 25,347.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,938.25 : 42,705.87 = 18,363 : x
  2. Step 2: Convert to fraction form
    30,938.25/42,705.87 = 18,363/x
  3. Step 3: Cross multiply
    30,938.25x = 42,705.87 × 18,363
  4. Step 4: Simplify right side
    30,938.25x = 784,207,890.81
  5. Step 5: Solve for x
    x = 784,207,890.81/30,938.25
  6. Step 6: Final answer
    x = 25,347.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.